CPV Adapter straight tube to boss P/N H859-4-4-S CONNECTION TYPE UNTHREADED INTERNAL TUBE 1ST END THREADED EXTERNAL BOSS 2ND END CONNECTION STYLE B30A SOCKET 1ST END B71 EXTERNAL SEAT FOR GASKET SEAL 2ND END NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED 0.250 INCHES 1ST END THREAD SERIES DESIGNATOR UNF 2ND END NOMINAL THREAD SIZE 0.438 INCHES 2ND END THREAD CLASS 2A 2ND END NOMINAL OVERALL LENGTH 1.438 INCHES CPV Manufacturing